Question about 2003 GMC Envoy

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2nd cyliner misfiring - 2003 GMC Envoy

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Check you spark plug wires .

Posted on Dec 29, 2010

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2007 Mercury Milan Premier V6 Misfiring


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1996 5.7 vortec misfire cyliner 4 and 6


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I have a 2001 ford escape xlt 4 wheel drive. i had a diagnostic test done & it said it detected a misfire in cylinder 3. i am a do it yourselfer and am going to change all 6 spark plugs but the problem...


I am assuming that you have a V6 Engine because 1, 3 and 5 would be on the other side of 2, 4 and 6. A Striaght in line engine would have them all in a row.

But another way to locate your spark plugs would be to find your Spark plug wires and follow them to the spark plug.

Good Luck

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Check engine light came on. Actron sates cyliner 1 misfire. I replaced the plug and the wire. Still the same problem


When you get a misfire ,you diagnose the issue

You do not replace parts until you have a reason to

If you have coil-on -plug you could replace that coil

If you need to replace the ignition module you save
your money and let a repair shop do the testing &
replacing the proper way

You may look for vacuum leaks that could have
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04 mazda 3s 2.3l. the emgine misfires randomly but frequently. does have power loss and poor gas mileage. there is no check engine light and had recent sparkplug change with motorcraft platnums and oil...


I have changed plugs using the platinum plugs and the problem don't go away. These plugs can make a car run worse in some cases. I have found it best to use the OEM or a step above on 4 cylin and 6 cylin engines. The Plats work fine in 8 cylin engines. You could also have a bad plug wire. The plug wire could be jumping spark. At night, open the hood, start the car with lights off. Look around the plug wires for sparks jumping. If a wire is bad, the spark is leaving the wire and grounding itself to the nearest metal causing rough engine idle and misfire.

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Random misfire on all cyliner a po300 code pops up in the scanner...


It sounds like the coil is breaking down or the cam sensor may be at fault for the misfiring. Use an inline tester and connect from the coil tower to the spark plug wire to check for a good steady fire. Do this on all coil wires to spark plugs. The best time to do this is at night so you can see it fire. You may want to remove the spark plugs and inspect them for a fouling condition. If all is well then look at the cam sensor for the problem. Hope this will help you.

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98 grand cherokee cyliner 1 misfire,, HELP ..


remove valve cover and check valve movement

if all valves have full motion then you have a bad set of rings

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2001 Beetle check engine light is on. Car was sputtering out of first to second gear.. sometimes 2nd to third. Checked code and came up cyliner misfire. Had plugs changed. Engine light is still on. Car...


Hi, the MIL (engine check light) will only go out when the car has had 50 drive cycles - start, run to normal operating temperature and stop, without further faults. A normal EOBD code reader such as you used to check for the fault originally should also be able to cancel the fault and put the light out. If the code won't clear, suspect a faulty ignition coil. Which is a common fault on these vehicles.
Hope that helps Matt...

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Mis fire on cyliner 1. Peugeot 206 1.4i Year 2000


you mite want to change the distributor cap or it might need a quick tune up
if the distributor is damaged then it wont always spark properly witch is why u will get full 200psi
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